若(2x-3y+1)²+|x+6y-4|=0,则x-y=

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若(2x-3y+1)²+|x+6y-4|=0,则x-y=
若方程{mx+(m-1)y=3,4x+3y=7的解x和y的值相等,则m=
若不等式{2x-a

2x-3y+1=0,(1)
x+6y-4=0 (2)
(1)*2+(2):5x=2,x=2/5
(2)*2-(1):15y=9,y=3/5
再问：亲，还有题目哦
再答：若方程{mx+(m-1)y=3,4x+3y=7的解x和y的值相等,则m=2 x=y, 4x+3y=7, x=1=y m+(m-1)=3,2m=4, m=2 若不等式{2x-a

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大若|x+2y-1|+y²+4y+4=0,求（2x-y）²-2（2x-y)(x+2y)+(x+2y)& 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的设x>1,y>0,若x^y+x^-y=2根号2,则x^y-x^-y等于若3x-4y=0,则x/y=______,（x-y)/y=______,（3x+2y)/(2x+3y)=_____. 若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值若x,y满足|2x-y-3|+|3x+2y+1|=0,则x= y= 若5x+3y=3x+4y=x+2y+6,则x+y=___ 若(1+X)²+Y+1的绝对值=0 则4x-3y分之2x-y等于?